How does a Skidmore Wilhelm work?

It’s all About Clamping Force As you turn the nut onto the bolt, it causes the threads to press tightly against each other. As tightening continues, the desired clamping force is achieved — the nut pulling in one direction, the bolt resisting from the other.

What is a Skidmore bolt test?

Skidmore Bolt Testing verifies that the bolt assembly meets the required specifications and capacity, while also confirming whether the installers of the bolt assembly have followed correct procedures.

What is a Skidmore tool?

Skidmore Wilhelm’s hydraulic tension calibrator, or bolt tension calibrator, has been the industry standard for testing high-strength bolts since we invented the technology in the 1950’s. Our units can safely be used with hand torque wrenches, impact guns, electric wrenches and hydraulic wrenches.

What is turn of nut method?

Turn-Of-Nut is performed by rotating the nut or bolt of a fastener assembly a specific turn angle based on the fastener’s length, and diameter while restraining the unturned element from rotating.

How many threads do I need to make a strong connection?

It is commonly known that the minimum recommended thread engagement to make a strong connection for a component with a tapped hole is approximately 1 times the nominal diameter in steel and 2 times the nominal diameter in aluminum. In many cases, (tapped hole in a softer material, special alloys, etc.)

What is snug tight?

Snug-tight is the condition that exists when all of the plies in a connection have been pulled into firm contact by the bolts in the joint and all of the bolts in the joint have been tightened sufficiently to prevent the removal of the nuts without the use of a wrench.

What is a DTI washer?

Direct tension indicators (DTI) are washers manufactured by Applied Bolting Technology and Turnasure. These washers are used on a hex assembly and are designed to ensure proper tension on bolts.

What is a twist off bolt?

These assemblies’ function by calibrating the torque needed to twist off a splined extension manufactured into the bolt shank. Made correctly, the “twist-off” will occur at a bolt pretension above the minimum required.

What is the difference between the Skidmore Wilhelm model MZ and MS?

This unit weights around 21lbs versus the 46lb model MS. Depending on the options that you select, the Skidmore Wilhelm Model MZ can perform bolt testing on the following diameters: 1/2″, 5/8″, 3/4″, 7/8″, 1″, 1-1/8″, and 1-1/4″ bolts. The new bushing design eliminates dowel pins. The base unit includes a Pelican carrying case.

Where can I rent a Skidmore Wilhelm Model M for testing?

The technicians at JM Test Systems have been trained on both calibration and repair of the Skidmore Wilhelm model M, and the newer model MZ. Skidmore bolt testing rental options are available at JM Test Systems including the Skidmore Wilhelm Model MZ.

What’s new at Skidmore-Wilhelm?

The tools most notable feature is the Angle Setting Dial. The feature allows us to specify the exact turn needed… Skidmore-Wilhelm recently acquired a production facility which included space for a new calibration lab.

What’s happening at Skidmore-Wilhelm’s calibration lab?

Skidmore-Wilhelm recently acquired a production facility which included space for a new calibration lab. We began work immediately to optimize the space to support the flow of calibration work that moves through our shop on a daily basis. When…